2Blumin JH, Johnston N. Evidence of extraesophageal reflux in idiopathic subglottic stenosis [ J ] . Laryngoscope, 2011 , 121 (6) :1266- 1273.
3Moya AS, Esparcia NM. , Urchueguia NM. The CO2 laser treatment of benign laryngeal stenosis in patients undergoing horizontal supraglottic laryngectomy [ J ]. Acta Otorrinolarin- gologica Espanola, 1999, 50(6) : 463 -466.
4Pena J, Cicero R, Matin J. Laryngotracheal reconstruction in subglottic stenosis : an ancient problem still present [ J ]. Otolaryngology - Head & Neck Surgery, 2001 , 125 ( 4 ) : 397 -400.
5Czigner J, Rovo L, Brzozka M. Circumferential resection of cricotracheal stenosis with primary end-to-end anastomosis [J]. Otolaryngologia Polska, 2004, 58 ( 1 ) : 149 - 155.
6Wu T, Li Y, Bian Z, et al. Randomized trials published in some Chinese journals: how many are randomized? Trials, 2009,10: 46.
7Ayello EA, Meanry G.Replicating a survey of pressure ulcer content in nursing textbooks[J].J Wound Ostomy Continence Nurs, 2003, 30 ( 05 ) : 266-271.
8Tweed C, Tweed M.Intensive care nurse' s knowledge of pressure ulcers : development of an assessment tool and effect of an educational program[J].Am J Crit Care, 2008, 17 ( 04 ) : 338-346.
